[{"mac_prefix":"00:0C:63","mask_bits":24,"block_type":"MA-L","organization":"Zenith Electronics Corporation","address":"2000 Millbrook Drive Lincolnshire Illinois US 60069","country":"US"},{"mac_prefix":"00:80:F7","mask_bits":24,"block_type":"MA-L","organization":"Zenith Electronics Corporation","address":"1000 MILWAUKEE AVENUE GLENVIEW IL US 60025","country":"US"},{"mac_prefix":"00:E0:DD","mask_bits":24,"block_type":"MA-L","organization":"Zenith Electronics Corporation","address":"1000 MILWAUKEE AVENUE GLENVIEW IL US 60025","country":"US"}]